Driving-gearing.



W. PUNIATowsKI. DRIVING HEARING.y

' APPLICATION FILED JAN. 31,1914. 1,107,108. Y I Patented Aug.11,1911

' 2 SHEETS-SHEET 1.

,WQ/@M 1 @Mfg/m W. PONIATOWSKI..

DRIVING GBARING. APIfLIGATIoN ULEB JAN. 31, 1914.

wm W m @am .7. mw m y UNITED sTATEs PATENT oEEroE.

WLADYSLAW PONIATOWSKI, 0F CAMDEN, NEW JERSEY.

DRIVING-GEARING.

Specication of Letters Patent.

Patented Aug. 11, 1914.

Application led January 81, 1914. Serial No. 815,797.

To all whom it may concern.'

Be it known that I, WLADYSLAW Ponta--A krate of speed than the crankshaft itself thus accelerating the rotation of the driving wheel of themachine.

A further object of the invention is to so combine the parts of thedriving mechanism as to enable the same tovbe readily disassembled forcleaning and repair.

A further object of the invention is to provide in connection with saiddriving gearing, means including an leccentric bearing whereby slacklmay lbe taken up il the rocket chain.

driving s e above and other obJects 1n vlew,

With t the invention consists in the novel construct1on,.comb1nat1on andarrangement of parts,-

as will hereinafter be more fully described,

illustrated and claimed.

In the accompanying drawings z--Figure 1 is a side elevation of aportion of the frame of a bicycle showing the aring of this inventionyapplied thereto. ig. 2 is an elevation looking toward the opposite sidefrom Fig. 1. Fig. 3 isa diametrical section taken in line with the crankshaft, thelatter bein shown in elevation. Fig. 4 is a verticalongitudinal section on the line 4-4 of Fig.

3 illustrating the coperation between the internal'gear and the spurgear. Fig. 5 is a detail view showing the central portion yof the'driving sprocket gear, the internal gear Vand the arts connectedtherewith being remov Fig. 6 is a detail section on the line 6-6 of Fig.5. Fig. 7 is a detail perspective View showing a portion of the drivingsprocket wheel, the

wheel and the spurbearing, and the crank hanger. Fig. 8 is a detailperspective view of the crank shaft, the internal gear, the cranks andthe parts intimately associated therewith.

Referring to the drawings 1 designates several of the frame bars of abicycle or similar foot-propelled vehicle, and 2 the crank hanger towardwhich said frame bars converge and to which they are lixedly attached.

In carrying out the present invention, I provide a main bearing 3 whichas shown in Fig. 3 is inserted through the crankhanger 2 and forms thebearing for the crank shaftA 4. This crank shaft is provided at one endwith acrank 5 which is preferably formed integrally with the crank shaft4, a diskshaped ange 6 being formed on the crank 4 adjacent to the innerend of the crank5. Adjacent to said flange 6l the crank shaft isthreaded as shown at `7 to admit of the adjustment of a ball cone 8which is threaded l on the crank shaft as shown and which bears againstan annular series of anti-friction balls 9 which travel in a ball-raceor cup 10 formed in the ad'acent face of the bearing 3. The opposite enportion of the crank shaft is also threaded at 11 to admit of theadjustment thereon of another ball cone 12 bearing against anothercircular series of anti-friction balls 13 containedv in a ballrace or`cup 14 in that end of the bearing 3. The ot 1er crank 15 vat theoppositeside of the machine is provided with a sleeve-like hub 16 which isthreaded upon the adjacent end of the crank shaft 4 so as to bearagainst and lock the cone 12. The extremity of the crank shaft 4 beyondthe threaded portion 11 is tapered and squared as at 17 to permit asquared and tapered key 18 to be inserted thereon for the purpose `ofholdingl the crank 15 180 from the crank 5. The key 18 is squared andtapered on the outside and fits into a recess of corresponding shape inthe crank 15. A. threaded plug 19 is inserted in the outer end of thehub 16 and serves to hold the key 18 in position.

The main bearing 3 is provided adjacent to one end with an eccentricBange 20 and an eccentric bearing portion 21 the purpose of which willhereinafter appear. At the yinner side of the Aflange 20 thejbearing 3is formed with a tapered portion 22 embodying a polygonal face or aplurality of relatively fiat surfaces as illustrated in Fig. 7 and thecrank hanger 2 is formed with corresponding faces to engage the flatsur` faces referred to for the purpose of preventing the bearing fromturning in the crank hanger 2. At the same time by loosening the crankshaft to remove the crank l5 and sliding the bearing 3 in the directionof its major axis, `said bearing -3 can be turned on its own axis to anydesired extent for the purpose of varying the angular relation of theeccentric bearing portion 21 above referred to, the object being to takeup slack in the driving sprocket chain (not shown) which extends fromythe driving sprocket wheel 23 to the usual sprocket wheel on the reardriving Wheel of the machine. been effected, 'the bearing 3 is securel.clamped in fixed relation to the crank hanger 2 by means of a takeeupclamping collar 24`which is threaded on the bearing 3 at 25 and which isadapted to ride upon a tapered face 26 at the adjacent end of the crankhanger 2 as clearly illustrated in Fig. 3.

The sprocket wheel '23 is sup orted on the eccentric portion 2l of theearing 3 by means of a radial thrust ball bearing shown in Figs. 3 and 5as consisting of a circular series of anti-friction balls 27 containedin openings. in a ring 28, .the said ball thrust bearing travelingaround the eccentric portion 21 of the bearingV 3 andwithin a spur gearwheel 29 locatedA at one side of the sprocket wheel 23 and bearing afixed relation thereto.. The bearing portlon 2l is formed at one or moreplaces with ball-'insertion pockets 30 as be'st illustrated in Fig; 6 toallow the balls 27 to be introduced in and removed from the openings inthe ring 28. These pockets 30 are quite shallow and permit the balls tobe intro.- duced into the openin'gsin the ring while theother ballspreviously placed in the ring are retained in position between thebearing surfaces. Said deep enough to interfere with the bearingsurfaces against which the balls roll. After the radial thrust bearingjust described has been inserted in its proper place, it is held thereinby a retainer ring 3l as shown in Fig. 3, said retainer ring beinthreaded on the eccentric portion l2l of tie bearing 3. Lubricating oilmay be introduced through oil holes 32 shown in Fig. l.

33 designates an internal gear wheel which meshes with the spur gear 29as best shown in Fig. 4. rfhis internal gear wheel 33 is closed on itsouter side as shown. at 34 When the desired adjustment has ockets are,however, not` ternal gear 33, the notches 37 forming shoulders whichinterlock with the spurs 36 to prevent relative rotative movementbetween the crank shaft and the internal gear 33. The said internal gearis thus caused to revolve with the crank shaft and acting on the spurgear wheel 29 causes the driving sprocket wheel 23 to revolve fasterthan the crank shaft thus accelerating the speed of the driving wheel ofthe machine.

The retainer ring 3l after being screwed upon the eccentric portion 21of the bearing 3 is held in place by one or more retaining screws 38,the heads of which overlie a shoulder 39 formed by rabbeting the innerface of said retaining ring as shown in Fig. 4.

What I claim iszl. Driving gearing for foot-propelled vchicles,comprising in combination, a Inachine frame, a crank hanger, a crankshaft, a crank shaft bearing extending through said crank hanger andhaving an eccentric bearing portion, a crank fast on one end of saidcrank shaft, a flange on said crank shaft, a driving sprocket wheeljournaled on the eccentric portion of said bearing a spur gearconcentric with and bearing a ixed relation to said sprocket wheel, aninternal `gear mounted on and concentric with said crank shaft andmeshing with said spur gear, and interlocking means on said internalgear and fiange on the crank shaft.

2. Driving gearing for foot-propelled vchicles, comprisingin'combination, a machine frame, a crank hanger, a crank shaft, a crankshaft bearing extending through said crank hanger and having aneccentric bearing portion, a crank fast on one end of said crank shaft,a flange on said crank shaft, a driving sprocket wheel journalcd on theeccentric portion of spur gear concentric with and bearing a ixedrelation to said sprocket wheel, an internal gear mounted on andconcentric with said crank Shaft and meshin r with said spur gear,interlocking means on said internal gear and flange on the crank shaft,said bearing being adjustable around its axis, and means for preventingsaid bearing from turningafter it has been so adjusted.

3. Driving gearing for foot-propelled vci hicles, comprising incombination, a machine frame, a crank hanger, a crank shaft, a crankshaft bearlng extending through said bearing, a

crank henger', a crank fast On one end said crank shaft., a Hange onsaid cra-nk shaft, i driving sprocket wheel journaled eccentricaliy ensaid bearing, a spur gear cencentric *with and reeerin4 a fixed relationit@ said sprocket wheel, an internal gear nwunteci on and concentricwith said cra-nk shaft and meshing with said spur gear, a

spur on said flange, and a shouider on said internal gear with whichsaid spur engages. 10 In testimony whereof I aHiX my signature inpresence of tWo Witnesses.

WLADYSLAW PONIATOWSKI. Witnesses:

HYMAN HOFFMAN, G. J. RATCLIFFE.

